I dare say that if your in the trade Laminate will always be the product and Laminex will always be a company owned by CSR. But anyone who asks me for Laminex I just assume means Laminate and will never bother to correct them as there's no real point to it other than the fact of being a smart ????.
All the other brands of Laminate that Sybarite mentioned are all well known brands throughout the trade but if your not in the trade then who really cares!
As for the laminate on top of laminate the only problem you may have is the edges. If there is a square edge, you will see the black line about 1.3mm thick on the edges . The laminate is generally not cut straight and you may have a 'double black line if you stick laminate on top again. If you have rolled (postformed) edges then forget about sticking laminate on top.
I am assuming that you mean b/tops or Laminate. If your talking coloured melamine board then the same thing applies except melamine is about half the thickness of a laminate.
